PHP Yardım (Acil)

<?php 
                   $error    = '';  
                   $name     = '';  
                   $soyisim  = ''; 
                   $email  = '';  
                   $firma  = ''; 
                 	 $subject = '';  
  				 $message = ''; 
  				 $spamcheck = ''; 
   
              if(isset($_POST['send'])) 
              { 
                   $name     = $_POST['name']; 
  				 $soyisim     = $_POST['soyisim']; 
                   $email    = $_POST['email']; 
  				 $firma     = $_POST['firma']; 
                   $subject  = $_POST['subject']; 
                   $message = $_POST['message']; 
  				 $spamcheck = $_POST['spamcheck']; 
   
                  if(trim($name) == '') 
                  { 
                      $error = '<div class="errormsg">Lütfen "Ad" Alanını Doldurun!</div>'; 
                  }  
  				     else if(trim($soyisim) == '') 
                  { 
                      $error = '<div class="errormsg">Lütfen "Soyad" Alanını Doldurun!</div>'; 
                  } 
              	    else if(trim($email) == '') 
                  { 
                      $error = '<div class="errormsg"Lütfen "Email" Alanını Doldurun!</div>'; 
                  } 
                  else if(!isEmail($email)) 
                  { 
                      $error = '<div class="errormsg">Geçersiz Bir E-mail Adresi Girdiniz!</div>'; 
                  } 
  				    
              	    else if(trim($subject) == '') 
                  { 
                      $error = '<div class="errormsg">Lütfen "Konu" Alanını Doldurun!</div>'; 
                  } 
              	else if(trim($message) == '') 
                  { 
                      $error = '<div class="errormsg">Lütfen "Mesaj" Alanını Doldurun!</div>'; 
                  } 
  	          	else if(trim($spamcheck) == '') 
  	            { 
  	            	$error = '<div class="errormsg">Lütfen "Soru" Alanını Doldurun!</div>'; 
  	            } 
  	          	else if(trim($spamcheck) != '5') 
  	            { 
  	            	$error = '<div class="errormsg">Soru Alanını Yanlış Girdiniz!</div>'; 
  	            } 
                  if($error == '') 
                  { 
                      if(get_magic_quotes_gpc()) 
                      { 
                          $message = stripslashes($message); 
                      } 
   
                      $to      = "altas.umut@yahoo.com"; 
   
                      $subject = ' ' . $subject; 
   
           
  $msg     = "From : $name \r\nSoyisim : $soyisim \r\ne-Mail : $email \r\nFirma : $firma \r\nSubject : $subject \r\n\n" . "Message : \r\n$message"; 
   
                      mail($to, $subject, $msg, "From: $email\r\nReply-To: $email\r\nReturn-Path: $email\r\n"); 
              ?> 
           
            <div style="text-align:center;"> 
              <p>Teşekkürler Sayın <b> 
               <?=$name;?> </b> <b><?=$soyisim;?> 
              </b>, Mesajınız İletildi!</p> 
            </div> 
   
              <?php 
                  } 
              } 
   
              if(!isset($_POST['send']) || $error != '') 
              { 
              ?> 
            
           
              <?=$error;?> 
            </p> 
            <form  method="post" name="contFrm" id="contFrm" action=""> 
              <table width="200" border="0"> 
          <tr> 
            <td><strong>Ad:</strong></td> 
            <td><input name="name" type="text"  id="name" class="input_field" size="30" value="<?=$name;?>" /></td> 
          </tr> 
          <tr> 
            <td><strong>Soyad:</strong></td> 
            <td><input name="soyisim" type="text"  id="soyisim" class="input_field" size="30" value="<?=$soyisim;?>" /></td> 
          </tr> 
          <tr> 
            <td><strong>E-mail:</strong></td> 
            <td><input name="email" type="text" id="email" class="input_field" size="30" value="<?=$email;?>" /></td> 
          </tr> 
          <tr> 
            <td><strong>Firma:</strong></td> 
            <td><input name="firma" type="text"  id="firma" class="input_field" size="30" value="<?=$firma;?>" /></td> 
          </tr> 
          <tr> 
            <td><strong>Konu:</strong></td> 
            <td><input name="subject" type="text"  id="subject" class="input_field" size="30" value="<?=$subject;?>" /></td> 
          </tr> 
          <tr> 
            <td><strong>Mesaj:</strong></td> 
            <td><textarea name="message" id="message" cols="2" rows="5" value="<?=$message;?>" /></textarea></td> 
          </tr> 
          <tr> 
            <td><strong>2 + 3=</strong></td> 
            <td><input name="spamcheck" type="text" class="box" id="spamcheck" size="4" value="<?=$spamcheck;?>" /></td> 
          </tr> 
          <tr> 
            <td><input type="submit" class="submit_btn float_l" name="send" id="send" value="Gönder" /></td> 
            <td><input type="reset" class="submit_btn float_r" name="reset" id="reset" value="Sil" /></td> 
          </tr> 
           
        </table> 
              <br /> 
              
            </form> 
             
            <?php 
              } 
   
              function isEmail($email) 
              { 
                  return(preg_match("/^[-_.[:alnum:]]+@((([[:alnum:]]|[[:alnum:]][[:alnum:]-]*[[:alnum:]])\.)+(ad|ae|aero|af|ag|ai|al|am|an|ao|aq|ar|arpa|as|at|au|aw|az|ba|bb|bd|be|bf|bg|bh|bi|biz|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|com|coop|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|edu|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gh|gi|gl|gm|gn|gov|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|in|info|int|io|iq|ir|is|it|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mil|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|museum|mv|mw|mx|my|mz|na|name|nc|ne|net|nf|ng|ni|nl|no|np|nr|nt|nu|nz|om|org|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|pro|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)$|(([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5]))$/i" 
                          ,$email)); 
              } 
              ?>